US2977302A - Method of lubrication employing a mixed metal sulfide lubricant and bearing surface with same applied thereto - Google Patents
Method of lubrication employing a mixed metal sulfide lubricant and bearing surface with same applied thereto Download PDFInfo
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- US2977302A US2977302A US663611A US66361157A US2977302A US 2977302 A US2977302 A US 2977302A US 663611 A US663611 A US 663611A US 66361157 A US66361157 A US 66361157A US 2977302 A US2977302 A US 2977302A
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- Prior art keywords
- bearing surface
- mixed metal
- tungsten
- sulfide
- molybdenum
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- 239000000314 lubricant Substances 0.000 title claims description 10
- 229910052976 metal sulfide Inorganic materials 0.000 title claims description 10
- 238000000034 method Methods 0.000 title claims description 6
- 238000005461 lubrication Methods 0.000 title description 2
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 6
- 230000001050 lubricating effect Effects 0.000 claims description 4
- 238000005979 thermal decomposition reaction Methods 0.000 claims description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 14
- 229910052750 molybdenum Inorganic materials 0.000 description 14
- 239000011733 molybdenum Substances 0.000 description 14
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 10
- 229910052721 tungsten Inorganic materials 0.000 description 10
- 239000010937 tungsten Substances 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 150000004763 sulfides Chemical class 0.000 description 6
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical class S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 229910052793 cadmium Inorganic materials 0.000 description 3
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- ZKKLPDLKUGTPME-UHFFFAOYSA-N diazanium;bis(sulfanylidene)molybdenum;sulfanide Chemical compound [NH4+].[NH4+].[SH-].[SH-].S=[Mo]=S ZKKLPDLKUGTPME-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 229910052753 mercury Inorganic materials 0.000 description 3
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- CXVCSRUYMINUSF-UHFFFAOYSA-N tetrathiomolybdate(2-) Chemical compound [S-][Mo]([S-])(=S)=S CXVCSRUYMINUSF-UHFFFAOYSA-N 0.000 description 3
- 229910052718 tin Inorganic materials 0.000 description 3
- 239000011135 tin Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- YKYOUMDCQGMQQO-UHFFFAOYSA-L cadmium dichloride Chemical compound Cl[Cd]Cl YKYOUMDCQGMQQO-UHFFFAOYSA-L 0.000 description 2
- ORMNPSYMZOGSSV-UHFFFAOYSA-N dinitrooxymercury Chemical compound [Hg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ORMNPSYMZOGSSV-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- -1 halogenides Chemical class 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical group [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- DBEGSBRHMSLHOR-UHFFFAOYSA-N [W]=S.[Ni]=S Chemical compound [W]=S.[Ni]=S DBEGSBRHMSLHOR-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 229910000366 copper(II) sulfate Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- RLJMLMKIBZAXJO-UHFFFAOYSA-N lead nitrate Chemical compound [O-][N+](=O)O[Pb]O[N+]([O-])=O RLJMLMKIBZAXJO-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 201000002266 mite infestation Diseases 0.000 description 1
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- OYFZPMSTNXACBO-UHFFFAOYSA-N sulfanylidenetin sulfanylidenetungsten Chemical compound [W]=S.[Sn]=S OYFZPMSTNXACBO-UHFFFAOYSA-N 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- PBYZMCDFOULPGH-UHFFFAOYSA-N tungstate Chemical compound [O-][W]([O-])(=O)=O PBYZMCDFOULPGH-UHFFFAOYSA-N 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M7/00—Solid or semi-solid compositions essentially based on lubricating components other than mineral lubricating oils or fatty oils and their use as lubricants; Use as lubricants of single solid or semi-solid substances
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G39/00—Compounds of molybdenum
- C01G39/006—Compounds containing molybdenum, with or without oxygen or hydrogen, and containing two or more other elements
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/065—Sulfides; Selenides; Tellurides
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/065—Sulfides; Selenides; Tellurides
- C10M2201/066—Molybdenum sulfide
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/02—Bearings
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/08—Solids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/10—Semi-solids; greasy
Definitions
- This invention relates to a novel solid lubricant and to a method-for preparing same. More specifically, it relates to mixed metal sulfide lubricants and to the preparation thereof. 7
- molybdenum and tungsten disulfides as dry or solid lubricants are known. Their ability to perform a lubricating function between bearing surfaces is believed to be due to the fact that they have a crystalline, layer-lattice structure that permits sulfide layers to move with relative ease over intermediate molybdenum o-r tungsten layers. Other heavy metal sulfides, whether naturally occurring or synthesized, have not been found to exhibit desirable lubricating properties as such.
- M molybdenum or tungsten
- Me is another heavy metal of group lb, IIb, IVa, Va, VIb, Vllb and VIII of the periodic table
- x and y are integers and twice y/x corresponds to the valence of Me.
- the reaction is carried out under non-oxidizing conditions, e.g., in an inert atmosphere such as nitrogen, or under subatmospheric pressure and at a temperature at least equal to the vaporization temperature of sulfur at the prevailing pressure.
- the temperature should be at least about 450 C. and preferably between 450 and about 600 C.
- subatmospheric pressure e.g., about 146 mm. Hg
- the temperature should be at least 350 C. and preferably between about 350 and 400 C.
- the heating time should be sufficient to thermally decompose substantially all of the tetrathio compound to the mixed metal sulfide. This ordinarily requires at least about one hour, the preferred heating time being about one to four hours.
- the initial mixed metal tetrathio compound may be obtained in known manner such as by double decomposition of solutions of alkalior ammonium tetrathiomolybdate or tungstate with solutions of appropriate metal salts such as the sulfates, halogenides, nitrates and acetates of the heavy metals.
- the salts that deserve particular mention as being appropriate for this purpose are the salts of monoand divalent copper, divalent zinc, monoand divalent mercury, monovalent silver, divalent manganese, nickel, cobalt, cadmium and lead, trivalent chromium and bismuth, diand trivalent iron and diand tetravalent tin.
- the mixed metal terathiomolybdates or tungstates thus prepared can, after careful drying at low temperatures of the order of 110 C., be heated for thermal decomposi- 2 tion under non-oxidizing conditions. Under these com ditions the heating of the tetrathio compound results in the separation of excess sulfur as indicated in the formula and in the transformation of the molybdenum or tungsten from the hexavalent to the .tetravalent form. An opportunity to recover the liberated sulfur 'is provided.
- Example 1 One mol of lead nitrate Pb(NO and one mol of ammonium tetrathiomolybdate (NH MoS were separately dissolved in hot water and the two solutions were rapidly poured together under vigorous stirring. After allowing the combined solution to stand, a precipitate of lead tetrathiomolybdate was separated, filtered, washed with water to remove soluble impurities and dried at C. The loose powder was placed and kept for one hour in a tube heater heated to 500 C., a stream of nitrogen being passed through the heater and passed through a cooled trap for separation of sulfur. A grey powder having a dull finish after grinding in a mortar was obtained.
- Example 2 Tetrathiotungstates of tin, chromium, nickel and zinc were heated in separate porcelain containers hermetically sealed from the air and provided with an exhaust valve in a mufile furnace to a temperature of 470 C. for onehalf haur and thereafter for two additional hours at 525 After cooling, it was found that the resulting mixed sulfides of tin sulfide-tungsten sulfide, chromium sulfidetungsten sulfide, nickel sulfide-tungsten sulfide and zinc sulfide-tungsten sulfide could easily be pulverized in a mortar and that their appearance resembled that of pulverized tungsten disulfide.
- Several of these mixed sulfides were applied to bearing surfaces and tested on an Almen Weiland machine in dry operation and compared with commercially available tungsten disulfide. The test results are as follows:
- M is a metal selected from the group consisting of molybdenum and tungsten
- Me is another heavy metal of groups Ib, 11b, IVa, Va, VIb, VIIb and VIII of the periodic system
- x and y are integers
- twice x/y corresponds to the valence of Me.
- a method of lubricating a bearing surface which Me (MS wherein M is a metal selected from the group 'consisting of molybdenum and tungsten, Me is another heavy 5.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Inorganic Chemistry (AREA)
- Lubricants (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Description
United States Patent METHOD OF LUBRICATION EMPLOYING A MIXED METAL SULFIDE LUBRICANT AND BEARING SURFACE WITH SAME APPLIED THERETO Giinter Spengler and Hannsheinz Hohn, Munich, Germany, assignors to The Alpha Molykote Corporation, Stamford, Conn.
No Drawing. Filed June '5, 1 957, Ser. No. 663,611
Claims priority, application Germany June 29, 1956 '12 Claims. (1252-25 This invention relates to a novel solid lubricant and to a method-for preparing same. More specifically, it relates to mixed metal sulfide lubricants and to the preparation thereof. 7
The use of molybdenum and tungsten disulfides as dry or solid lubricants is known. Their ability to perform a lubricating function between bearing surfaces is believed to be due to the fact that they have a crystalline, layer-lattice structure that permits sulfide layers to move with relative ease over intermediate molybdenum o-r tungsten layers. Other heavy metal sulfides, whether naturally occurring or synthesized, have not been found to exhibit desirable lubricating properties as such.
It has now been found that it is possible to synthesize a solid or dry lubricant of excellent properties by thermally decomposing a mixed metal tetrathio compound, in which one of the metals is molybdenum or tungsten, to the corresponding mixed metal sulfide. This is believed to be accomplished in accordance with the following reaction:
x( 4)y x y( 2)y+y wherein M is molybdenum or tungsten, Me is another heavy metal of group lb, IIb, IVa, Va, VIb, Vllb and VIII of the periodic table, x and y are integers and twice y/x corresponds to the valence of Me.
The reaction is carried out under non-oxidizing conditions, e.g., in an inert atmosphere such as nitrogen, or under subatmospheric pressure and at a temperature at least equal to the vaporization temperature of sulfur at the prevailing pressure. Thus, for example, if the reaction is carried out under nitrogen at atmospheric pressure, the temperature should be at least about 450 C. and preferably between 450 and about 600 C. If the reaction is carried out at subatmospheric pressure, e.g., about 146 mm. Hg, the temperature should be at least 350 C. and preferably between about 350 and 400 C. The heating time should be sufficient to thermally decompose substantially all of the tetrathio compound to the mixed metal sulfide. This ordinarily requires at least about one hour, the preferred heating time being about one to four hours.
The initial mixed metal tetrathio compound may be obtained in known manner such as by double decomposition of solutions of alkalior ammonium tetrathiomolybdate or tungstate with solutions of appropriate metal salts such as the sulfates, halogenides, nitrates and acetates of the heavy metals. The salts that deserve particular mention as being appropriate for this purpose are the salts of monoand divalent copper, divalent zinc, monoand divalent mercury, monovalent silver, divalent manganese, nickel, cobalt, cadmium and lead, trivalent chromium and bismuth, diand trivalent iron and diand tetravalent tin.
The mixed metal terathiomolybdates or tungstates thus prepared can, after careful drying at low temperatures of the order of 110 C., be heated for thermal decomposi- 2 tion under non-oxidizing conditions. Under these com ditions the heating of the tetrathio compound results in the separation of excess sulfur as indicated in the formula and in the transformation of the molybdenum or tungsten from the hexavalent to the .tetravalent form. An opportunity to recover the liberated sulfur 'is provided.
It has been found that under the conditions described the thermal decomposition not only results in a formation of a layer-lattice structure for the molybdenum or tungsten disulfide that is formed, which is similar to that of natural molybdate, but also that the sulfide of the other metal appears to be incorporated into the lattice structure. The mixed sulfides that are formed possess desirable lubricant qualities that are quite unexpected. One important advantage of the method of the invention is that high yields of lubricant products can be obtained and that the method does not produce gaseous by-products that create any recovery problems.
These and other advantages, as well as the utility of the invention, will readily become apparent from the following examples included to illustrate the best modes now contemplated of carrying out the invention.
Example 1 One mol of lead nitrate Pb(NO and one mol of ammonium tetrathiomolybdate (NH MoS were separately dissolved in hot water and the two solutions were rapidly poured together under vigorous stirring. After allowing the combined solution to stand, a precipitate of lead tetrathiomolybdate was separated, filtered, washed with water to remove soluble impurities and dried at C. The loose powder was placed and kept for one hour in a tube heater heated to 500 C., a stream of nitrogen being passed through the heater and passed through a cooled trap for separation of sulfur. A grey powder having a dull finish after grinding in a mortar was obtained.
In asimilar manner, cupric sulfate CuSO .5H O, mercuric nitrate Hg(NO manganous sulfate MnSO .7H O, cadmium chloride CdCl and ferroammonium sulfate FeSO .(NH SO .6H O were reacted with ammonium tetrathiomolybdate or sodium tetrathiomolybdate and the resulting tetrathiomolybdate's of copper, mercury, mange-1 nes'e, cadmium and iron were thermally decomposed, after drying, to the corresponding mixed metal sulfides.
Several of these mixed metal sulfides were applied to bearing surfaces and tested in an Ahnen Wieland machine. The results of these tests and of comparative tests with natural and synthetic molybdenum disulfides are tabulated immediately below:
Frictional Force at a Load of It is apparent from the data in the table that the mixed sulfides are at least equal in effectiveness as lubricants to natural and synthetic molybdenum disulfide in so far as friction at various load levels is concerned. Inspection 0 of the bearings after the tests showed that the mixed metal sulfides are also fully equivalent in that the test bearings were free of grooves, had highly polished mirror surfaces and showed no measurable abrasion.
Example 2 Tetrathiotungstates of tin, chromium, nickel and zinc were heated in separate porcelain containers hermetically sealed from the air and provided with an exhaust valve in a mufile furnace to a temperature of 470 C. for onehalf haur and thereafter for two additional hours at 525 After cooling, it was found that the resulting mixed sulfides of tin sulfide-tungsten sulfide, chromium sulfidetungsten sulfide, nickel sulfide-tungsten sulfide and zinc sulfide-tungsten sulfide could easily be pulverized in a mortar and that their appearance resembled that of pulverized tungsten disulfide. Several of these mixed sulfides were applied to bearing surfaces and tested on an Almen Weiland machine in dry operation and compared with commercially available tungsten disulfide. The test results are as follows:
Frictional Force at 21 Load Mixed Sulfides 500 kgs.
1,500 kgs.
11in sulfide-Tungsten sulfide N ickel sulfide-Tungsten sulfide Tungsten disulfide M1507 GUN 4 metal of groups Ib, IIb, IVa, Va, VIb, VIIb and VIII of the periodic system, x and y are integers, and twice x/y corresponds to the valence of Me.
2. A bearing surface having applied thereto a mixed metal sulfide having a crystalline, layer-lattice structure and prepared by thermal decomposition of a mixed metal tetrathio compound having the general formula Me (MS wherein M is a metal selected from the group consisting of molybdenum and tungsten, Me is another heavy metal of groups Ib, 11b, IVa, Va, VIb, VIIb and VIII of the periodic system, x and y are integers, and twice x/y corresponds to the valence of Me.
3. A bearing surface as defined in claim 2 wherein M is molybdenum and Me is lead.
4. A bearing surface as defined in claim 2 wherein M I is molybdenum and Me is copper.
1. A method of lubricating a bearing surface which Me (MS wherein M is a metal selected from the group 'consisting of molybdenum and tungsten, Me is another heavy 5. A bearing surface as defined in claim 2 wherein M is molybdenum and Me is mercury.
6. A bearing surface as defined in claim 2 wherein M is molybdenum and Me is manganese.
7. A bearing surface as defined in claim 2 wherein M is molybdenum and Me is cadmium.
8. A bearing surface as defined in claim 2 wherein M is molybdenum and Me is iron.
9. A bearing surface as defined in claim 2 wherein M is tungsten and Me is tin.
10. A bearing surface as defined in claim 2 wherein M is tungsten and Me is chromium.
11. A bearing surface as defined in claim 2 wherein M is tungsten and Me is nickel.
12. A bearing surface as defined in claim 2 wherein M is tungsten and Me is zinc.
References Cited in the file of this patent UNITED STATES PATENTS 2,039,259 Pier et a1. Apr. 28, 1936 2,159,511 Pier et a1 May 23, 1939 2,227,672 Pier et a1. Jan. 7, 1941 2,420,886 Lafioon May 20, 1947 2,421,543 Cook June 3, 1947 2,435,380 Archibald et a1 Feb. 3, 1948 2,770,527 Alderson et al Nov. 13, 1956
Claims (1)
1. A METHOD OF LUBRICATING A BEARING SURFACE WHICH COMPRISES APPLYING THERETO, AS A LUBRICANT, A MIXED METAL SULFIDE HAVING A CRYSTALLINE, LAYER-LATTICE STRUCTURE AND PREPARED BY THERMAL DECOMPOSITION OF A MIXED METAL TETRATHIO COMPOUND HAVING THE GENERAL FORMULA
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2977302X | 1956-06-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2977302A true US2977302A (en) | 1961-03-28 |
Family
ID=8050807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US663611A Expired - Lifetime US2977302A (en) | 1956-06-29 | 1957-06-05 | Method of lubrication employing a mixed metal sulfide lubricant and bearing surface with same applied thereto |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2977302A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3224966A (en) * | 1962-03-07 | 1965-12-21 | Honeywell Inc | Low friction material |
| US3377279A (en) * | 1964-07-22 | 1968-04-09 | Molykote Produktions G M B H | Method of preparing lubricants |
| US3453209A (en) * | 1966-01-21 | 1969-07-01 | Molykote Produktions Gmbh | Lubricants for dies |
| US3956146A (en) * | 1973-07-20 | 1976-05-11 | Agency Of Industrial Science & Technology | Self-lubricating wear-resistant composite materials |
| US4130492A (en) * | 1978-01-16 | 1978-12-19 | Exxon Research & Engineering Co. | MXY3 solid lubricants |
| EP0001953A1 (en) * | 1977-11-07 | 1979-05-16 | CENTRE STEPHANOIS DE RECHERCHES MECANIQUES HYDROMECANIQUE ET FROTTEMENT Société dite: | Antifriction alloy, process for the manufacture thereof, and die and lubricant containing such an alloy |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2039259A (en) * | 1932-01-15 | 1936-04-28 | Standard Ig Co | Carrying out catalytic reactions |
| US2159511A (en) * | 1934-01-11 | 1939-05-23 | Standard Ig Co | Carrying out catalytic reactions |
| US2227672A (en) * | 1936-11-30 | 1941-01-07 | Standard Ig Co | Thermal treatment of carbonaceous materials with suitable catalysts |
| US2420886A (en) * | 1942-12-03 | 1947-05-20 | Westinghouse Electric Corp | Application of solid lubricant coatings to surfaces |
| US2421543A (en) * | 1945-01-19 | 1947-06-03 | Union Oil Co | Lubricant |
| US2435380A (en) * | 1944-09-04 | 1948-02-03 | Shell Dev | Process for preparing catalysts |
| US2770527A (en) * | 1953-05-28 | 1956-11-13 | Du Pont | Ternary ferrous group metal sulfides of molybdenum and tungsten and their preparation |
-
1957
- 1957-06-05 US US663611A patent/US2977302A/en not_active Expired - Lifetime
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2039259A (en) * | 1932-01-15 | 1936-04-28 | Standard Ig Co | Carrying out catalytic reactions |
| US2159511A (en) * | 1934-01-11 | 1939-05-23 | Standard Ig Co | Carrying out catalytic reactions |
| US2227672A (en) * | 1936-11-30 | 1941-01-07 | Standard Ig Co | Thermal treatment of carbonaceous materials with suitable catalysts |
| US2420886A (en) * | 1942-12-03 | 1947-05-20 | Westinghouse Electric Corp | Application of solid lubricant coatings to surfaces |
| US2435380A (en) * | 1944-09-04 | 1948-02-03 | Shell Dev | Process for preparing catalysts |
| US2421543A (en) * | 1945-01-19 | 1947-06-03 | Union Oil Co | Lubricant |
| US2770527A (en) * | 1953-05-28 | 1956-11-13 | Du Pont | Ternary ferrous group metal sulfides of molybdenum and tungsten and their preparation |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3224966A (en) * | 1962-03-07 | 1965-12-21 | Honeywell Inc | Low friction material |
| US3377279A (en) * | 1964-07-22 | 1968-04-09 | Molykote Produktions G M B H | Method of preparing lubricants |
| US3453209A (en) * | 1966-01-21 | 1969-07-01 | Molykote Produktions Gmbh | Lubricants for dies |
| US3956146A (en) * | 1973-07-20 | 1976-05-11 | Agency Of Industrial Science & Technology | Self-lubricating wear-resistant composite materials |
| EP0001953A1 (en) * | 1977-11-07 | 1979-05-16 | CENTRE STEPHANOIS DE RECHERCHES MECANIQUES HYDROMECANIQUE ET FROTTEMENT Société dite: | Antifriction alloy, process for the manufacture thereof, and die and lubricant containing such an alloy |
| FR2407986A1 (en) * | 1977-11-07 | 1979-06-01 | Stephanois Rech Meca Hy Centre | ANTIFRICTION ALLOY AND ITS MANUFACTURING PROCESS |
| US4130492A (en) * | 1978-01-16 | 1978-12-19 | Exxon Research & Engineering Co. | MXY3 solid lubricants |
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